John Mastoras is a senior partner in our Canadian employment and labour law group. He is known to clients as a passionate and dedicated advocate and business partner who provides innovative and practical advice.
John is frequently called upon to litigate highly contentious matters such as disruptive labour disputes and workplace mental health issues, and acts exclusively for employers in the broader area of labour and employment law. He regularly litigates and provides strategic advice in connection with labour arbitrations, labour relations board disputes, human rights proceedings, occupational health and safety charges, workers' compensation, labour injunctions and common law employment actions. His practice spans union and non-union workplaces for both federally and provincially regulated employers.
John is often in the forefront as chief spokesperson in collective bargaining and provides helpful counsel in this regard to a variety of employers. He routinely acts for a broad group of employer clients and employer associations in various industries, including energy, pulp and paper, pharmaceutical, health care, insurance, longshoring, construction, retail, food processing, transportation, steel, automotive and manufacturing more generally.
For the past 20 years, John has taught at the University of Toronto's Centre for Industrial Relations and Human Resources (CIRHR), where he is an adjunct professor. He was conferred the Morley Gunderson Prize by the University of Toronto as a CIRHR graduate who combines outstanding professional achievement with significant service to the university.